Purchase includes free access to book updates online and a free trial membership in the publisher''s book club where you can select from more than a million books without charge. Chapters: Interceptor Aircraft, Ship Gun Fire-Control Systems, Hacs, List of Antiaircraft Weapons, German Searchlights of World War Ii, Gyro Rate Unit, Pom-Pom Director, Surface-To-Air Missile, Barr and Stroud, Tachymetric, Mark 8, Fire Control Computer, Continuous-Rod Warhead, List of Surface-To-Air Missiles, Fuze Keeping Clock, Skyguard I. Excerpt: Barr